Wall Street ends turbulent week with losses as AI sector wobbles

Wall Street's major indexes closed lower on Friday, October 23, 2026, ending a turbulent week for the artificial intelligence (AI) sector, which is a key market driver. The Dow Jones fell 652.82 points (1.23%) to 52,215.16, while the S&P 500 dropped 0.52% and the Nasdaq slipped 0.21%. Weekly, the S&P 500 and Nasdaq declined, though the Dow rose for a third straight week. Concerns over AI funding costs weighed on tech. Investors now focus on upcoming earnings from major AI companies like Alphabet, Microsoft, and Amazon, and the Federal Reserve's policy meeting. About a third of S&P 500 firms will report quarterly results next week.